She will absolutely adjust fast. She'll be pestering the old man in no time and driving you up the wall. LoL.
I'd keep a bowl of dry food out for her to investigate and munch on. Keep water out for her too.
Feed canned food 2-3 time a day. Not a bunch because the diet should be mostly dry. As for the cat milk, you won't need it. But it'll be a nice treat.